Duvet fastening system



FIG. 1 is an isometric view of the duvet fastening system shown within aduvet cover environment drawn in broken lines;

FIG. 2 is an enlarged detail isometric view showing one of eightfasteners within the duvet fastening system;

FIG. 3 is a front view;

FIG. 4 is a back view;

FIG. 5 is a right side view;

FIG. 6 is a left side view;

FIG. 7 is a top side view; and,

FIG. 8 is a bottom side view.

The broken lines shown in the drawings are included for the purpose ofillustrating a duvet cover environment and form no part of the claimeddesign.

CLAIM The ornamental design for a duvet fastening system, as shown anddescribed.